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This paper considers coordinated path following of multiple underactuated unmanned surface vehicles (USVs) subject to dynamical uncertainties and limited control torques. The objective is to achieve a symmetric formation pattern over a closed curve. Adaptive coordinated path following controllers are developed by combing a parameter cyclic pursuit approach, a line-of-sight guidance principle, and...
In this letter, we propose a ranging estimation scheme for indoor positioning based on high-speed visible light communication (VLC) system. The proposed scheme could provide high accuracy position of the receiver, without affecting the transmission efficiency of VLC. Discrete multi-tone (DMT) VLC signals emitted from light-emitting diodes (LEDs) are employed for both of high-speed communication and...
This paper investigates the collaborative estimation and control problem of wireless sensor and actuator networks (WSANs) in the greenhouse environments. In order to reduce the energy consumption of the sensor nodes, each node is designated to transmit data to the actuator nodes under the non-uniform transmission rate mode. Considering the mutual effect of related clusters, a collaborative control...
This paper investigates the deployment of collaborative estimation and actuation scheme of wireless sensor and actuator networks for the agriculture industry. In our proposed scheme, sensor nodes conduct a local estimation based on the Kalman filter for enhancing the estimation stability and further transmit data to the actuator nodes under a multi-rate transmission mode for enhancing the overall...
For the purpose of filtering road spectrum this paper proposed an adaptive Kalman filtering (AKF) algorithm based on accurate autoregressive (AR) model. The proposed AKF can overcome the disadvantages such as complicated computation process and poor real-time performance when applying normal AKF. The algorithm can implement AKF by adjusting gain matrix Kk on the base of innovation. The process of...
For SAR-GMTI system, efficient motion parameters estimation is a key challenge for moving targets imaging and localization, especially in low SNR scenarios. By four dimension (4-D) parameters searching, the Radon FRFT can achieve motion parameters estimation even when the SNR is low. But the 4-D searching operation brings heavy computation load. Focusing on these, we propose an efficient Radon FRFT...
In this paper, we propose a broadband Doppler estimation and compensation receiver, which combines a bi-directional decision feedback equalizer (DFE). Compared with the existing receivers, the proposed closed loop Doppler estimation and compensation receiver combined with a bi-directional DFE can not only estimate and compensate the broadband Doppler symbol-by-symbol, but also reduce the error propagation...
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